CN110582766A - Method and system for automatically analyzing flow field by using virtual wind tunnel based on network - Google Patents
Method and system for automatically analyzing flow field by using virtual wind tunnel based on network Download PDFInfo
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Abstract
the invention relates to a method and a system for automatically analyzing a flow field by using a virtual wind tunnel based on a network, which are characterized in that the method for automatically analyzing the flow field by using the virtual wind tunnel based on the network comprises the following steps: a step (S10) in which the user PC generates a standardized 3D model; step (S20), the user PC connects to the website, uploads the generated 3D model file; a step (S30) in which a user PC transmits physical property information of a 3D model on which flow analysis in a virtual wind tunnel is to be performed, thereby setting a user environment; step (S40), the server generates the optimal virtual wind tunnel environment based on the 3D model and the physical property information thereof through the website; a step (S50) in which the server automatically performs flow analysis; and (S60) automatically exporting the flow analysis information exported by the server to be a flow analysis result through a website, and utilizing a network-based virtual wind tunnel flow field automatic analysis system to execute the method.
Description
Technical Field
the present invention relates to a method and system for automatically analyzing a flow field using a virtual wind tunnel based on a network, and more particularly, to a method and system for automatically generating an analysis space (Domain) and an analysis mesh (mesh) of a virtual wind tunnel most suitable for an input model by a flow analysis system if a 3D model file and specific analysis condition information are transmitted through a network, then performing flow analysis, and transmitting the analysis result to a user through a website.
background
In the automotive and aerospace fields, which are important fields of flow analysis, experiments are generally performed using a flow visualization device, i.e., a wind tunnel, in order to confirm flow information under the designed operating conditions of an automobile or an aircraft, i.e., conditions such as speed, pressure, density, and temperature.
A wind tunnel (wind tunnel) is an apparatus for artificially flowing air in order to perform a wind tunnel experiment for examining an air flow phenomenon, a force generated by an air flow on an object, a motion of an object in an air flow, and the like. For this purpose, experiments were conducted by making a continuous air flow with colors that can be confirmed by the ordinary eye.
however, since the wind tunnel requires an expert who secures a construction site, construction cost, purchase cost of a flow analysis program for calculating a measurement result, and analysis of data derived from the flow analysis program, there are not many enterprises, institutions, or persons who can use the wind tunnel alone.
In general, CAE (Computer Aided Engineering) is an analysis process for simulating whether a desired result can be obtained by a Computer with a general virtual Model (Prototype Model) as an object in all Engineering fields, and can be said to be an analysis method for designing an optimal Model (design) by repeatedly executing such CAE analysis process until satisfaction is reached.
Most of CAE analysis methods widely used in engineering are "finite-element methods".
In the CAE analysis method, a structure (or a three-dimensional shape) is composed of a model composed of a set of elements divided into interconnected blocks (chunks). After the analysis of each component is performed, an analysis result (output result) can be automatically obtained from the calculation execution result of the computer.
In the CAE analysis methodology, a process of constructing a model of finite elements is often called preprocessing, and a process of displaying an analysis result by using a picture or a graph is often called post-processing.
in order to analyze a Flow Field (Flow Field), an object is modeled into a 3-dimensional shape using a CAD program, and after the CAE analysis program calls the object out, the size of each mesh (mesh) of the modeled shape is manually specified and input one by one according to a menu provided by the CAE analysis program. Boundary conditions (for example, flow rate, pressure, constraint conditions, and the like) are manually specified and input for each mesh set in size.
as a next step of completing the condition input work, a CAE analysis program is run to calculate the flow pressure. The process so far is commonly referred to as "flow field resolution" or "flow resolution".
however, since the CAE analysis method is applied to the field of automobiles and aircrafts, and it is difficult to set an optimal analysis space for an automobile or an aircraft as an experimental object and automatically set the size of each mesh applied to the shape of an automobile or an aircraft model in the set analysis space in place of a wind tunnel experiment, an automatic analysis method or system of a flow field using a virtual wind tunnel has not been proposed so far.
In addition, even if a method or a system for automatically analyzing a flow field using a virtual wind tunnel is proposed, there is an economic burden of purchasing it, so that it is difficult for scattered small and medium-sized enterprises or individuals to be realistic.
Even if a method or system for automatically analyzing a flow field using a virtual wind tunnel is purchased, the analysis operation is impossible without high professional knowledge, and thus there is a limitation in use.
literature of the prior art
Patent document
(patent document 1) Korean registered patent publication No. 10-0863075(2008.10.06)
(patent document 2) Korean laid-open patent publication No. 10-2014-once 0127647(2014.11.04)
disclosure of Invention
an object of the present invention for solving the above-described problems is to provide a method and system for: a user who cannot set the wind tunnel experiment device himself/herself generates a 3D model by using a standardized program, uploads information related to a 3D model file through network networking, automatically executes flow analysis after an automatic analysis system automatically generates an analysis space and an analysis grid of a virtual wind tunnel which are most suitable for an input model, and then transmits a flow analysis result to the user through a website.
The present invention, which achieves the above objects and solves the problems of the prior art, provides an automatic flow field analysis method using a virtual wind tunnel based on a network, comprising the steps of:
The user PC generates an interchangeable standardized 3D model by using a CAD program;
the user PC is connected to a website for executing virtual wind tunnel analysis, and is used for authenticating user information and uploading the generated 3D model file;
A user PC connected to a website transmits physical property information of a 3D model on which flow analysis in a virtual wind tunnel is to be performed, thereby setting a user environment;
a server executing flow analysis generates an optimal virtual wind tunnel environment through a website on the basis of the 3D model and the physical property information thereof;
The server automatically executes flow analysis on the 3D model under the optimal virtual wind tunnel environment;
And automatically exporting the flow analysis information exported by the server as a flow analysis result through the website.
as a preferred embodiment, the step of generating an optimal virtual wind tunnel environment based on the 3D model and the physical property information thereof by the server performing the flow analysis through the website may include the steps of: analyzing the characteristics of the analysis object model, namely whether the analysis object 3D model is a model in the field of automobiles or aircrafts; automatically generating an automatic resolution space by utilizing a domain name optimization DB; automatically setting conditions according to an Inlet, an Outlet, a Top and a Bottom of the analysis space; generating a mesh according to the flow operation speed using the mesh optimization DB; the mesh compactness optimization DB is used to optimize the compactness of the mesh around the analysis object, thereby automatically generating the mesh.
as a preferred embodiment, the step of automatically performing, by the server, the flow analysis of the 3D model in the optimal virtual wind tunnel environment may include the steps of: automatically executing an analysis condition standardization program by using the analysis standardization DB; selecting an optimal turbulence coefficient according to the field; selecting an optimal analysis time interval; the viscosity coefficient is selected according to the medium.
as a preferred embodiment, the 3D model may use a file that is converted into a STEP file format or an IGES file format after designing an object of an automobile or aircraft with 3D CAD.
In the step S30, the physical property may be defined as whether the flow speed of the analysis object or the density of the air changes.
as another embodiment of the present invention, there is provided a flow field automatic analysis system using a virtual wind tunnel based on a network, including:
A user PC which generates and uploads 3D model design information of an automobile or an aircraft, physical property information of a designed 3D CAD model, and user registration information;
The server is connected with the user PC through a network including the Internet and executes virtual wind tunnel flow analysis on the 3D model;
A member information DB connected to the server, storing and managing member information, system use information, and the like;
the virtual wind tunnel environment DB comprises a domain name optimization DB, a grid optimization DB and a grid compactness optimization DB and is used for generating an optimal virtual wind tunnel environment suitable for the input 3D model;
and an analysis standardization DB which stores information used for optimal automatic flow analysis in a virtual wind tunnel environment.
As a preferred embodiment, the server is arranged to process the following steps: the user PC generates an interchangeable standardized 3D model by using a CAD program; the user PC is connected to a website for executing virtual wind tunnel analysis, and is used for authenticating user information and uploading the generated 3D model file; a user PC connected to a website transmits physical property information of a 3D model on which flow analysis in a virtual wind tunnel is to be performed, thereby setting a user environment; a server executing flow analysis generates an optimal virtual wind tunnel environment through a website on the basis of the 3D model and the physical property information thereof; the server automatically executes flow analysis on the 3D model under the optimal virtual wind tunnel environment; and automatically exporting the flow analysis information exported by the server as a flow analysis result through the website.
as a preferred embodiment, the step S40 is configured to process the following steps: analyzing the characteristics of the analysis object model, namely whether the analysis object 3D model is a model in the field of automobiles or aircrafts; automatically generating an automatic resolution space by utilizing a domain name optimization DB; automatically setting conditions according to an Inlet, an Outlet, a Top and a Bottom of the analysis space; generating a mesh according to the flow operation speed using the mesh optimization DB; the mesh compactness optimization DB is used to optimize the compactness of the mesh around the analysis object, thereby automatically generating the mesh.
as a preferred embodiment, the 3D model may use a file that is converted into a STEP file format or an IGES file format after designing an object of an automobile or aircraft with 3D CAD.
in the step S30, the physical property may be defined as whether the flow speed of the analysis object or the density of the air changes.
the method and the system for automatically analyzing the flow field by using the virtual wind tunnel based on the network, which are disclosed by the invention, have the following advantages: the method comprises the steps that a user generates an interchangeable standardized 3D model in a file form by using a 3D CAD program, then connects the 3D model to a remote website, selects a menu corresponding to the design field of the corresponding 3D model, uploads the 3D model, simultaneously inputs data related to physical properties of the 3D model only known by the user, automatically executes flow analysis after generating an optimal analysis space and an analysis grid of a virtual wind tunnel by using the 3D model and analysis conditions input by the website, and automatically transmits a flow analysis result to the user through a network and utilizes the result after the execution is finished.
therefore, even a designer who is a layman in the field of wind tunnel and flow analysis can easily approach numerical analysis, and besides, a conventional design method that is independent of the experience of the designer can prevent execution errors and save cost and time, so that industrial utilization can be expected as an invention having advantages of high marketability and high usability.
Drawings
FIG. 1 is a schematic configuration diagram of an automatic analyzing system of a flow field of a virtual wind tunnel based on a network according to an embodiment of the present invention,
fig. 2 is a sequence diagram schematically illustrating a process of a method for automatically analyzing a flow field of a virtual wind tunnel according to an embodiment of the present invention,
Figure 3 is a flowchart showing the detailed steps of step S40 of figure 2,
Figure 4 is a flowchart showing the detailed steps of step S50 of figure 2,
FIG. 5 is an illustration showing a spatial grid generated in view of a GUI (Graphical User Interface) and a wake around a car according to one embodiment of the present invention,
fig. 6 is an illustrative diagram showing a pattern in which an automatic mesh is formed according to an embodiment of the present invention.
Description of the reference symbols
10: the user PC 20: server
30: the member information DB 40: virtual wind tunnel environment DB
50: parsing of the standardized DB 410: domain name optimization DB
420: grid optimization DB 430: grid compactness optimization DB
Detailed Description
the configuration of the embodiment of the present invention and its operation will be described in detail below with reference to the drawings. In describing the present invention, detailed descriptions of related known functions or configurations are omitted when it is determined that the detailed descriptions may unnecessarily obscure the gist of the present invention.
fig. 1 is a schematic configuration diagram of a network-based virtual wind tunnel flow field automatic interpretation system according to an embodiment of the present invention, fig. 2 is a sequence diagram schematically illustrating a procedure of a virtual wind tunnel flow field automatic interpretation method according to an embodiment of the present invention, fig. 3 is a flowchart illustrating a detailed step of step S40 of fig. 2, fig. 4 is a flowchart illustrating a detailed step of step S50 of fig. 2, fig. 5 is an exemplary diagram illustrating a wake generation spatial grid around a car in consideration of a GUI (Graphical User Interface) according to an embodiment of the present invention, and fig. 6 is an exemplary diagram illustrating a state in which an automatic grid is formed according to an embodiment of the present invention.
The invention relates to a method for generating a virtual wind tunnel, which comprises the steps that more than one user computer generates interchangeable standardized 3D models by utilizing a known 3D CAD program, the generated 3D model files are connected with networks such as the Internet, so as to execute flow analysis in the virtual wind tunnel, according to the method, the user computer is connected to a website, a menu which is in accordance with the field of the user, namely an automobile or an aircraft, is selected, the 3D model files are uploaded and relevant information of physical properties of the 3D model which is only known by the user is input, an analysis space and an analysis grid which are most suitable for the input 3D model are generated by utilizing the 3D model and analysis conditions input by the website and referring to a preset DB, then flow field analysis is automatically executed in the generated optimal analysis space and analysis grid conditions, and flow analysis results are transmitted to the user through the network after the execution is finished.
Therefore, even a 3D model designer who is a layman who cannot install a wind tunnel and does not have special knowledge of flow field analysis by itself, can easily approach numerical analysis, and can prevent execution errors and save cost and time, departing from the existing design method depending on the experience of the designer.
Specifically, the system for automatically analyzing a flow field using a virtual wind tunnel based on a network according to the present invention for performing the virtual wind tunnel flow analysis includes: a user PC10 that generates and uploads 3D model design information of an automobile or aircraft, physical property information of a designed 3D cad model, and user registration information; a server 20 connected to the user PC via a network such as the internet, for executing virtual wind tunnel flow analysis of the 3D model; a member information DB30 connected to the server, storing and managing member information, system use information, and the like; a virtual wind tunnel environment DB40 including a domain name optimization DB410, a mesh optimization DB420, and a mesh compactness optimization DB430, for generating an optimal virtual wind tunnel environment suitable for the input 3D model; an analysis standardized DB50 storing information for optimal automatic flow analysis in a virtual wind tunnel environment.
The flow field automatic analysis method according to the present invention having the above-described configuration includes:
Step S10, the user PC generates an interchangeable standardized 3D model by using a CAD program;
Step S20, connecting the user PC to the website for executing virtual wind tunnel analysis, authenticating user information and uploading the generated 3D model file;
Step S30, the user PC connected to the website transmits physical property information of the 3D model to be subjected to flow analysis in the virtual wind tunnel, thereby setting a user environment;
Step S40, the server executing the flow analysis generates the best virtual wind tunnel environment through the website based on the 3D model and the physical property information;
Step S50, the server automatically executes flow analysis of the 3D model under the optimal virtual wind tunnel environment;
Step S60, automatically exporting the flow analysis information exported by the server as a flow analysis result through the website.
in STEP S10, the user PC creates an interchangeable standardized 3D model using a CAD program, designs a 3D model by 3D modeling for an object in the automobile or aircraft field using a commercial 3D CAD program or a dedicated 3D CAD program developed for flow analysis, and then converts the model into a STEP file format or an IGES file format and uploads the converted file format to a server connected to a website in order to transmit the interchangeable standardized 3D model file format.
the 3D model file comprises various attribute values (properties) of the design process. The attribute value (property) is defined as information such as a layer name (layer name) or a color (color) given to each mesh (mesh) by the 3D CAD program in the 3D modeling process as a well-known menu provided by the 3D CAD program, and by using the flow analysis system of the present invention based on the attribute value, even if there is no separate CED program, a user can automatically optimize the virtual wind tunnel analysis space without performing a task of setting a mesh size value and setting a boundary condition value, which is difficult and requires much time, so that the mesh size value and the boundary condition value are defined in an optimal form to analyze the mesh and generate the mesh.
The step S20 of the user PC connecting to a website that performs virtual wind tunnel analysis, authenticating user information, and uploading the generated 3D model file is performed through the following processes: membership authentication is performed by a user PC connected to a website that automatically performs virtual wind tunnel flow analysis according to the present invention. In the process, the users generate their respective IDs and passwords for logging in order to use the web service, the information is stored in the user DB, and then user authentication is performed every time connection is made. The detailed member authentication procedure can be sufficiently realized by any of known methods, and thus, a detailed description thereof is omitted.
And if the member authentication is completed, uploading the 3D model file stored in the STEP file format or the IGES file format to the generated user PC.
the set user environment step S30 of the user PC connected to the web site transmitting the physical property information of the 3D model to be subjected to the flow analysis in the virtual wind tunnel is the following steps: a user inputs to a server a definition of a basic physical property of one of an analysis space and an analysis grid of an object 3D model under a virtual wind tunnel and an analysis condition for performing flow analysis.
in the case of flow analysis, the definition of the flow velocity of the analysis object is basic in the physical properties, and the definition of whether the input air density changes or not is defined. In general, if the density is changed, the analysis is performed under the same supersonic speed condition as that of a moving aircraft in a space with a relative speed of 100-500/s, and the analysis is performed in a space with a relative speed of 10-100 m/s as that of an automobile under a condition that the density is not changed.
Therefore, the user selects a field such as an aircraft and an automobile and sets conditions on the initial screen. The virtual wind tunnel analysis space according to the invention is optimized by inputting the user information, and the size value and the boundary condition value of the grid are defined in an optimal form and generate the analysis grid.
The step S40 of the server performing the flow analysis generating the optimal virtual wind tunnel environment based on the 3D model and the physical property information thereof through the website specifically includes: step S410, analyzing the characteristics of the analysis object model, namely, analyzing whether the analysis object 3D model is a model in the field of automobiles or aircrafts; step S420, automatically generating an automatic analysis space by utilizing the domain name optimization DB410 forming the virtual wind tunnel environment DB 40; step S430, automatically setting conditions according to the Inlet, the Outlet, the Top and the Bottom of the analysis space; step S440, generating a grid according to the flow operation speed by using a grid optimization DB420 constituting a virtual wind tunnel environment DB 40; step S450 is to optimize the mesh compactness around the analysis object by using mesh compactness optimization DB430 constituting virtual wind tunnel environment DB40, thereby automatically generating a mesh.
In the step S420 of automatically generating an automatic analysis space, when the flow analysis is performed, conditions simulating an experiment in an actual wind tunnel are simulated and implemented, and therefore, if the analysis object 3D model is in the center of the wind tunnel, the analysis space needs to be implemented by a surrounding rectangular structure, which is problematic in that if the analysis space is too large, the analysis result is irrelevant, the number of generated grids is too large, much time and cost are required when the analysis is performed, and conversely, if the analysis space is too small, time and cost are saved when the analysis is performed, but the analysis accuracy is reduced. The present invention can optimize the problem by calling and applying the domain name optimization DB410 that accumulates and stores resolution space data according to a plurality of objects.
in the present invention, an optimal resolution space can be generated using the stored domain name optimization DB410 for general models such as automobiles and aircrafts as 3D models of resolution objects. Therefore, if the user accurately decides the domain of the 3D model in the beginning, the resolution space can be automatically set with reference to the domain name optimization DB 410.
Specifically, in order to generate an analysis space according to the present invention, the present invention selects an axis having a long Length among the vertical and horizontal lengths of an analysis object to determine a characteristic Length (Characteristics Length), and sets the front-rear Length and the width of the analysis object based on the Length. As for the program, if a 3D model file is input, it is generated by automatically extracting the maximum/minimum lengths of the x-axis, y-axis, z-axis and automatically calling out the domain name optimization DB 410.
the step S440 of generating a mesh according to a flow manipulation speed using the mesh optimization DB420 constituting the virtual wind tunnel environment DB40 is a step of forming a GUI for input generation and visualization of a 3D model. (refer to FIGS. 5 and 6)
For this purpose, an input 3D model in a format such as STEP/IGES is accepted and visualized. In addition, the shape of the input model is recognized and automatic mesh generation for the surface is performed with reference to the mesh optimization DB420 in which meshes accumulated according to a plurality of objects are stored. Accordingly, even a complex 3D model can be input while being performed by automatic mesh generation with reference to the mesh optimization DB 420.
in one embodiment of the present invention, the normalization table used to generate the grid is shown in Table 1 below.
[ Table 1]
In the field of wind tunnel flow analysis similar to the present invention, most of the media used are air, and in the case of automobiles, aircrafts, buildings, and the like existing in a space with an analysis space opened, a grid optimization DB420 according to the present invention is used in order to automatically perform grid analysis in the field by specifying and standardizing setting values according to a field replacement designer.
The number of meshes stored in the mesh optimization DB420 and standardized is usually about 5000 ten thousand for the aircraft case, at a level of 8000 ten thousand, and for the automobile case, considering the wake-related meshes. In particular, in the case of an automobile, since the influence of wake flow is large, a dense mesh having a length twice the length of a vehicle is required from the rear side of an analysis object, and therefore, the analysis standardization is an important factor for the automation of analysis.
Referring to fig. 5, in the field of automobiles, the grid is dense, the grid form is only seen when the grid is enlarged, and the grid formed around the automobile is clearer as the grid is closer.
the step S50, in which the server automatically performs the flow analysis of the 3D model in the optimal virtual wind tunnel environment, includes: step S510, automatically executing an analysis condition standardization program using the analysis standardization DB 50; s520, selecting an optimal turbulence coefficient according to the field; step S530, selecting an optimal analysis time interval; step S540, selecting a viscosity coefficient according to the medium.
in the above step, the flow analysis is performed using a conventional CFD (Computational Fluid Dynamics) program or an Open Source (Open Source) for future use. This process is the same as the process of processing data by a normal CFD program, and thus detailed description is omitted.
In the case of a virtual wind tunnel automatic analysis system created using a backup program, as one example, the automatic analysis in the virtual wind tunnel uses an open source code, and the open source code constitutes an analysis program based on JAVA using a supported command script.
In step S60, in which the flow analysis information derived by the server is automatically derived as a flow analysis result by the website, an analysis result automatically executed by flow analysis of the 3D model is automatically extracted by a CFD program, extracted by a CAD visualization module, and worked by a command script, whereby the extracted result can be automatically confirmed on the website, and if necessary, the user PC can confirm it by mail. Therefore, even a user without high expertise can know the wind tunnel experiment result.
the present invention is not limited to the specific preferred embodiments described above, and various modifications can be made by those having ordinary knowledge in the art to which the present invention pertains without departing from the gist of the present invention claimed in the scope of claims.
Claims (10)
1. A flow field automatic analysis method by utilizing a virtual wind tunnel based on a network is characterized by comprising the following steps:
a step (S10) in which the user PC generates an interchangeable standardized 3D model using a CAD program;
Step (S20), the user PC is connected to the website for executing virtual wind tunnel analysis, and the user information is authenticated and the generated 3D model file is uploaded;
A step (S30) in which a user PC connected to a web site transmits physical property information of a 3D model on which flow analysis in a virtual wind tunnel is to be performed, thereby setting a user environment;
Step (S40), the server executing the flow analysis generates the optimal virtual wind tunnel environment based on the 3D model and the physical property information thereof through the website;
A step (S50) in which the server automatically performs flow analysis of the 3D model in an optimal virtual wind tunnel environment;
and a step (S60) of automatically exporting the flow analysis information exported by the server as a flow analysis result through the website.
2. The method for automatically analyzing a flow field using a virtual wind tunnel based on a network according to claim 1, wherein the step (S40) comprises:
Step (S410), analyzing the characteristics of the analysis object model, namely whether the analysis object 3D model is a model in the field of automobiles or aircrafts;
A step (S420) of automatically generating an auto-resolution space by using a domain name optimization DB (410);
Step (S430), automatically setting conditions according to the Inlet, the Outlet, the Top and the Bottom of the analysis space;
A step (S440) of generating a mesh according to the flow operation speed by using a mesh optimization DB (420);
And a step (S450) of automatically generating a mesh by optimizing the mesh compactness around the analysis object by using the mesh compactness optimization DB (430).
3. the method for automatically analyzing a flow field using a virtual wind tunnel based on a network according to claim 1, wherein the step (S50) comprises:
A step (S510) for automatically executing an analysis condition standardization program by using an analysis standardization DB (50);
Step (S520), selecting an optimal turbulence coefficient according to the field;
Step (S530), selecting an optimal analysis time interval;
Step (S540), according to the medium, the viscosity coefficient is selected.
4. The method according to claim 1, wherein the virtual wind tunnel comprises a flow field analysis module for analyzing the flow field of the virtual wind tunnel,
the 3D model uses a file which is converted into a STEP file format or an IGES file format after an automobile or an aircraft is designed by 3D CAD.
5. The method according to claim 1, wherein the virtual wind tunnel comprises a flow field analysis module for analyzing the flow field of the virtual wind tunnel,
in the step (S30), the physical property is defined as whether the flow velocity of the analysis object or the density of the air changes.
6. an automatic flow field analysis system using a virtual wind tunnel based on a network is characterized by comprising:
A user PC (10) that generates and uploads 3D model design information of an automobile or aircraft, physical property information of the designed 3D CAD model, and user registration information;
A server (20) connected to the user PC via a network including the Internet, for executing virtual wind tunnel flow analysis of the 3D model;
a member information DB (30) connected to the server, storing and managing member information, system use information, and the like;
A virtual wind tunnel environment DB (40) comprising a domain name optimization DB (410), a grid optimization DB (420), a grid compactness optimization DB (430) for generating an optimal virtual wind tunnel environment suitable for the input 3D model;
And an analysis standardization DB (50) which stores information used for optimal automatic flow analysis in a virtual wind tunnel environment.
7. the system for automated flow field analysis using network-based virtual wind tunnels according to claim 6, wherein the server (20) is configured to process the steps of:
a step (S10) in which the user PC generates an interchangeable standardized 3D model using a CAD program;
Step (S20), the user PC is connected to the website for executing virtual wind tunnel analysis, and the user information is authenticated and the generated 3D model file is uploaded;
A step (S30) in which a user PC connected to a web site transmits physical property information of a 3D model on which flow analysis in a virtual wind tunnel is to be performed, thereby setting a user environment;
Step (S40), the server executing the flow analysis generates the optimal virtual wind tunnel environment based on the 3D model and the physical property information thereof through the website;
A step (S50) in which the server automatically performs flow analysis of the 3D model in an optimal virtual wind tunnel environment; and
and a step (S60) of automatically exporting the flow analysis information exported by the server as a flow analysis result through the website.
8. The automatic flow field interpretation system using a virtual wind tunnel according to claim 7, wherein said step (S40) is configured to process the steps of:
Step (S410), analyzing the characteristics of the analysis object model, namely whether the analysis object 3D model is a model in the field of automobiles or aircrafts;
A step (S420) of automatically generating an auto-resolution space by using a domain name optimization DB (410);
Step (S430), automatically setting conditions according to the Inlet, the Outlet, the Top and the Bottom of the analysis space;
a step (S440) of generating a mesh according to the flow operation speed by using a mesh optimization DB (420);
and a step (S450) of automatically generating a mesh by optimizing the mesh compactness around the analysis object by using the mesh compactness optimization DB (430).
9. The automatic flow field analysis system using a virtual wind tunnel according to claim 7,
The 3D model uses a file which is converted into a STEP file format or an IGES file format after an automobile or an aircraft is designed by 3D CAD.
10. The automatic flow field analysis system using a virtual wind tunnel according to claim 7,
in the step (S30), the physical property is defined as whether the flow velocity of the analysis object or the density of the air changes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109711064A (en) * | 2018-12-28 | 2019-05-03 | 上海市建工设计研究总院有限公司 | A kind of method and device using ABAQUS simulation value wind-tunnel |
| CN111207904A (en) * | 2020-01-02 | 2020-05-29 | 北京航天测控技术有限公司 | Wind tunnel test method, device and equipment based on VR and computer readable medium |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110096758B (en) * | 2019-04-09 | 2023-05-23 | 天津大学 | Parameterized dynamic design method for flood discharge energy dissipater of hub engineering |
| CN110196990A (en) * | 2019-04-19 | 2019-09-03 | 中国人民解放军63921部队 | Spatial mesh structure Wind Engineering analysis method across superelevation greatly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6088521A (en) * | 1998-05-04 | 2000-07-11 | Ford Global Technologies, Inc. | Method and system for providing a virtual wind tunnel |
| JP2004361091A (en) * | 2003-06-02 | 2004-12-24 | Kawasaki Heavy Ind Ltd | Wind tunnel test method and wind tunnel testing device |
| CN101160519A (en) * | 2005-04-15 | 2008-04-09 | 空中客车德国有限公司 | Device for automatic evaluation and control of wind tunnel measurements |
| KR20080088685A (en) * | 2007-03-30 | 2008-10-06 | 쎄딕(주) | System and method for automatic cae analysis based on the web |
| CN104977430A (en) * | 2015-06-19 | 2015-10-14 | 东南大学 | Virtual test apparatus for thermal wind speed sensor in absence of wind tunnel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104508422B (en) * | 2012-05-30 | 2019-05-21 | 赛创尼克株式会社 | Monitor the system and method for the physical change of marine structure |
| KR20140049187A (en) * | 2012-10-16 | 2014-04-25 | 주식회사 디엔에프컨설팅 | Mobile and web-based three-dimensional fluid simulation system and method |
| KR102043963B1 (en) * | 2013-04-25 | 2019-11-12 | (주)수도프리미엄엔지니어링 | Operation Method of Virtual Wind Tunnel |
-
2017
- 2017-04-27 WO PCT/KR2017/004475 patent/WO2018199356A1/en active Application Filing
- 2017-04-27 CN CN201780090050.5A patent/CN110582766A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6088521A (en) * | 1998-05-04 | 2000-07-11 | Ford Global Technologies, Inc. | Method and system for providing a virtual wind tunnel |
| JP2004361091A (en) * | 2003-06-02 | 2004-12-24 | Kawasaki Heavy Ind Ltd | Wind tunnel test method and wind tunnel testing device |
| CN101160519A (en) * | 2005-04-15 | 2008-04-09 | 空中客车德国有限公司 | Device for automatic evaluation and control of wind tunnel measurements |
| KR20080088685A (en) * | 2007-03-30 | 2008-10-06 | 쎄딕(주) | System and method for automatic cae analysis based on the web |
| CN104977430A (en) * | 2015-06-19 | 2015-10-14 | 东南大学 | Virtual test apparatus for thermal wind speed sensor in absence of wind tunnel |
Non-Patent Citations (1)
| Title |
|---|
| KIM, EUN-KYUNG 等: "A Grid Web Portal for a Wind Tunnel Simulation", 《PROCEEDING OF KOREAN INSTITUTE OF INFORMATION SCIENTISTS AND ENGINEERS 2005 FALL CONFERENCE(I)》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109711064A (en) * | 2018-12-28 | 2019-05-03 | 上海市建工设计研究总院有限公司 | A kind of method and device using ABAQUS simulation value wind-tunnel |
| CN111207904A (en) * | 2020-01-02 | 2020-05-29 | 北京航天测控技术有限公司 | Wind tunnel test method, device and equipment based on VR and computer readable medium |
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|---|---|
| WO2018199356A1 (en) | 2018-11-01 |
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